This 40A, 20V ESC from Dualsky is designed for RC planes and helicopters. The software and hardware in this ESC is the 2nd version of its kind from Dualsky and offers many new features. For example, this ESC can support all motor types up to 210,000rpm (2-pole motors). It has a very low resistance and factory high-quality MosFETs, for high-current usage. This ESC comes ready with Dualsky Governor Mode (DGM). There is an adjustable cut-off for either motor stop or power reduction. The Dualsky Linear Brake Mode (DLBM) can be switched on or off. This brake strength can be adjusted by the transmitter when switched on. Full protection features are offered with this Dualsky ESC. These include low voltage cut-off, over heating protection and automatic cut-off in the event of a signal loss. Additionally, there are normal, soft or super-soft startup modes available for both fixed wing and helicopter setups. This ESC offers smooth and accurate throttle control throughout the range. Throttle digital signal sampling is compatible with the signal frequency of 14ms (normal mode) and 7ms high speed mode (HS mode). This throttle range can be re-calibrated to make it suitable for all brands of transmitter. It is fully PC-programmable when used with the Dualsky USB link and a compatible programming card can be used for easy reprogramming at the field. This ESC also features UBEC switching power supply, to support up to 6S LiPo (3A) and easily support 4-5pcs of standard digital servos.